stock is certainly a stronger type of plastic than the ****box dorman one and the revised GM is way better. If you ever have the chance, take a Phillips screwdriver and just start stabbing the OE one and then a dorman one and see what happens. I did this in a junkyard to see if a GM tech was bull****ting and he wasn't.
Well I haven't tested dorman's, but I did try smashing the old stock one and couldn't. I threw it on the ground, and hit it with a sledge and it didn't break lol. BUT the egr and coolant port area was my main concern.
2006 Grand Prix GT S/C 109k - Modded Transgo Shift Kit, Gutted Airbox, Dash Cam, and Inlays. Retros soon to come. 2002 Grand Prix GT N/A 127k - Same as 06 Plus: Trans Cooler, DIY Aux Input, LED lighting, Suspension Upgrades, Tint, Retrofits. Sold.